diff --git a/libra/mgm/mgm.py b/libra/mgm/mgm.py
index e030afe5..2697043c 100644
--- a/libra/mgm/mgm.py
+++ b/libra/mgm/mgm.py
@@ -87,6 +87,6 @@ def main():
                 logger.critical("Invalid group: %s" % args.group)
                 return 1
         with context:
-            server.main(args)
+            server.main(args=args)
 
     return 0
diff --git a/libra/worker/worker.py b/libra/worker/worker.py
index b0f4b691..51e5bae3 100644
--- a/libra/worker/worker.py
+++ b/libra/worker/worker.py
@@ -227,6 +227,6 @@ def main():
                 return 1
 
         with context:
-            server.main(args)
+            server.main(args=args)
 
     return 0